Multiple drill apparatus



Dec. 9, 1930. w. P. HUNT MULT IPLE DRILL APPARATUS Filed Nov. 23. 1927 3 Sheets-Sheet 1 Wm WINVENTOR. BY Wvim 71.

M ATTORNEY.

' Dec. 9, 1930. w. P. HUNT 1,784,288

MULTIPLE DRILL APPARATUS Filed Nov. 23, 1927 5 Sheets-Sheet 2 24% i v 3 8 i Q ,I 'I 6- 4/ M ATTORNEY.

1930- w. P. HUNT MULTIPLE DRILL APPARATUS Filed Nov. 23, 1927 3 Sheets-Sheet 3 INVEN TOR.

ATTORNEYv 7mm? 9mm Patented Dec. 9, 1930 UNITED STATES WILSON P. HUNT, OF MOLINE, ILLINOIS MULTIPLE DRILL APPARATUS Application fi1ed November 23, 1927. Serial No. 235,177.

My invention has reference to a multiple drill apparatus, and pertains more specially the mechanism so that such drills will fail, is tofact. The purpose of the present invention is to provide a simple and effective nieans, operable while the machine is in movement, for omitting: any drill or drills that may be desired from the operation of 20 the machine, without interfering with the actionof the remaining tools.

In the drawings; Fig.1 is an elevation of that portion of a multiple machine that carries the drlll mech- 25 anism, with the invention applied thereto.

Fig. 2 is an enlarged detail, partly in section, of one of the spindle controlling devices. I

* Fig.3 is an elevation of another form of "30 the device, and

Fig.4 is a front edge view thereof. As shown in Fig. 1 themachine is of the compound type, with two sets of drills in parallel relation, and control devices there for are shown, operable from one side of the machine. I.

The reference number 1 indicates a portion of a frame, and 2 a-carriage such as is .usually mounted in machines of the type mentioned, so as to be. capable of vertical play. Supported in the carriage is a pair of housings 3 and 4, in which are rotatably mounted shafts 5 and 6, on which are worm drives 7, engaging worm gears 8 on spindles Y 9 and10. In the lower ends of said spindles are the usual drills 11, which may be replaced by other similar tools.

On the upper face of the housing 3 is a bracket12, with which is pivotally connected 510 a link 13, on the upper end of which is fulcrumed a lever 14, which has a connection at one end withth'e' upper end of a sleeve 15, in which the upper end of the spindle 9 is rotatably supported, so as to be moved up wardly or downwardly by said sleeve. The connection between the lever and sleeve is by means of a slot 16 in the lever and pin 17 in the head ofthe sleeve passing through the slot, said head being preferably recessed to receive the end of the lever. The end of i the lever is provided with a catch 18 for engagement with an off-set on a post 19, supported on the housing 3. The lever is projected rearwardly into an arm 20, theend of which is connected by a coiled spring 21 with a bracket on the housing 3, the tendency of the spring being to urge the lever forwardly, or in the direction of the sleeve 15. Connected withthelever 14 is an arm '22, prov1ded on its end with a knob 23.

apparatus at 24, between the'lower end of the sleeve 15 and a shoulder on the spindle 9. If

it is desired to put the drill out of action this is accomplished by striking the ball 23 to force the arm 22 and lever 14 rearwardly, releasing the catch 18, and permitting the lever to fly upwardly, as shown in broken lines in Fig. 2, this movement beingimpelled by the spring 21, the lever carrying with it the spindle 9 and tool therein, to a point where the tool willnot operate on the work contained 7 in the machine. In this operation the link 13 rocks outwardly on its pivot, and the necessary movement of the end of the lever 14 with relation to the head of the sleeve 15 is afforded by the slot 16. When it is desired to return the tool to an operating position this is done by pulling the arm 22 downward- 1y, causing the lever 14 to automatically reengage with the p'ost'lQ.

Movement may be imparted to the shaft 5 to rotate the same by any known mechanical means, as for example, by a motor 25 mounted on the carriage 2, and shaft 26 thereof, upon which is fixed a gear-wheel 27, in mesh with a-larger gear wheel 29 on the shaft 5.

Pivotally supported on the housing 4 is a link 30, upon the upper end of which is pivoted a lever 31, Slotted at its end for engagement with a pin 32 in the head of a sleeve 33,

carrying the upperend of the spindle 10, with I an arrangement similar to that of the sleeve 15, but not shown in detail herein. On the end of the lever 31 is a catch 34, for engagement with a detent on a post 35, mounted on the housing 4. The lever 31 is projected into i an arm 36, the endof which isconnected by" a spring 37 with a hook on the housing 4, and operates to hold the catch 34 in engagement I with the 'detent, as in the former case. Fixed 1 to the lever 31 is an arm 38, projecting in the 7 same general direction as the arm 22, and prolever to move-upwardly, under the force of the spring '37; The spindlesa're permitted I vertical movement independentlyof the gears thereon, by means of a spline on the spindle,

as shown at 40 in Fig. 2, and, channel 41 in thegear.

shown and set forth herein and the operating and controlling I mechanisms therefor, bare parts inseries'of such devices, arranged: for

7 multiple operations} The operating arms 22 and 38 therefor are-all directed toward one side of the machine, where the-operator is positioned, and convenient i r' for: operation from that side. -The-leveri31 is res-engaged with its detentbyrocking the lever 1down wardly on its pivot, and to disengage the same the arm ,38 isgiven quick, pull outwardly. I 7 x r r In 3 and4 is shown a form ofthe device for use with spindles which are operated by a shafteinsubstantial-alignment therewith, instead of the gearing ,hereinbeore referredto; Inthis formw -42'indicates a cylindrical housing, in which islvertically movable a sleeve 43, in whichis rotatably shaft 44, by meansv of a coupling45. At its upper endjthe housing 42 is provided with a pair of ears'47,between which is pivoted one end: of a hand-lever 48,'and atits lower end the'sleeve 43 is fitted with a pair of ears 49,

7 between whichispivoted one end of a link 51,by means of a pin'52, the other end of said link having apivotal connection with the lever '48 as at a. Midwayits ends said link is provided-with a turn-buckle apparatus 53,

. V foradjusting the length of the link."

', 'When the lever 48 is raised, as, shown Fig, 3 in full lines, the sleeve 43 is heldin desired toraise the "of sa d arm outwar =ters Patent, is: r

" pair ofi' spindle supporting devices op fly disposed oin'said carriage capable 0 indeout of operative position. This movement is o assisted by a spring 54, connected at one end ward the sleeve 43,-i1ntil the pivot a is a ittle beyond aline between the pivot 52' and pivot I ofsaid arm, which prevents accidental movement, of the arm upwardly, and assists in holding" the drill to) its work. When it is sdpindle a slight movement y will serve to overcome this Idadloclnand the armand connected parts will move upwardly under. the impulse ofthe'spring54.v f f W By either of the mechanisms hereinbefore setforth an individual drill can be engaged quic ly,'and' while the machine is in operation if desired. 1,

1 Gearing similar; to that shown for-driving the shaft 5 may be provided for the shaft 6,'-a motor'55 "being provided therefor at the a p "opposite 'end' of the carriageffrom the motor It will be understood that the spindles 25; I f a What I claim,:and desire to secure.by -.-Letf 1. A device of means described, m les ing a frame and carriage movablethereon, a

pendent movement to or from a piece of work and tool-holding spindlessupported thereby, spring controlled levers yieldably' mounted for: movement away from each otherv and catchmechanism therefonfsaid levers operatively connected with: the spindle sup- 7 ports,catch devices on said levers and detents therefor on said carriage, and operatorslrods connected with said levers and projected in the same general direction for operation from one side of the machine for usein actuating said levers torelease the same and cause'a retraction of the spindlesfrom a piece of work. 7 supported a-spindle43. Connected with the I upper end of said spindle .is anoperating 2. ,In a machine of the class described, comprising a frame, and multiple drill units therein adapted for simultaneous operation nudes;

offwork contained-in said machine, means connected with each of said drill units, for throwing the same out of operation independ-- ently of the others, consisting of a lever mech-' r ,ingsaid lever with the catch in engaging pod- -tion,"and an operators rod attachedto jsaid lever, and provided at itsend'with a knob for imparting a quick movement to said rod and o pable .of independentretraction 'frorna I lever to cause a retraction of said unit from a piece of work.

3. In a device of the class described, a frame, a carriage supported thereby so as to be capable of a vertical reciprocating movement, a plurality of tool spindles supported in said carriage .so as to be independently axially movable therein in the same direction in which the carriage moves, spring-impelled levers connected with said spindles, detents carried by said carriage with which said levers are normally engaged, holding said spindles in operative positions, and means connected with said levers for selective release of one or more thereof, to permit retraction of the tool spindle or spindles connected therewith from a piece of work.

' In testimony whereof I aifix my signature.

WILSON P. HUNT. 

